There definitely are gender differences, which may correlate with neural connectivity and structural differences between male and female brains. Man can observe superficial phenotypic difference between male and female of our species - males are bigger, more muscular, less risk averse, etc. - that are clearly biological. Furthermore, cursory glance at human employment distribution within a society suggests the male-female dimorphism. Some fields women do not pursue, regardless of employment availability; others are dominated by women. Male and female of the species throughout the animal kingdom are specialized to serve distinct purposes. To ignore reality is, as you write, to foster and perpetuate tyranny born of ignorance.